Upon receiving my Cowon S9, I used to Windows Media Player first to sync my music to my S9. However, I have found WMP very unorganized. It has so many flaws, therefore I switched over to MediaMonkey and instantly like it better. It's a lot more user friendly compared to WMP and the Cowon Jetaudio software. But I have run into a problem. I've no clue how to delete music from the S9, so I have double of every song from syncing it with WMP and MediaMonkey. Does anyone know how to fix this?